I saw Keith Ballard play this game and it looks great, but when I launched it it was very laggy which I dealt with as i played, but I can't get past the slide box puzzle because by the time I finally line it up the box won't go to the windmill screen.
My computer may not be the best spec wise, but I do hope that the final version allows for optimization.
On a similar point i wish the arrow keys or WASD could also control the view (assuming they aren't used elsewhere) this may help moments where a shaky hand would mess up players in timed puzzles.